[Diy_efi] HiWay Mode Question

[dowelljd at alltel.net]

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> 
> From: "josephl at aei.ca" <josephl at aei.ca>
> Date: 2005/04/14 Thu PM 12:01:56 CDT
> To: diy_efi at diy-efi.org
> Subject: RE: [Diy_efi] HiWay Mode Question
> 
> Jim - Why not just set up a filter in your email client to send the email
> to a seperate folder. Then you can look at what interests you (by
> subject)and scrap the rest. Keeps you up on the latest discussions without
> overwhelming your inbox and you!!!
> 
> Joe
> 
> Original Message:
> -----------------
> From: Jim Powell jpowell at olp.net
> Date: Thu, 14 Apr 2005 07:48:23 -0500
> To: diy_efi at diy-efi.org
> Subject: RE: [Diy_efi] HiWay Mode Question
> 
> 
> Guys what can I do about this email.. I am over whelmed with email, and
> there is no way that I can answer let alone read all these many emails.. How
> do I get off the list..? Thanks...
> 
> -----Original Message-----
> From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org] On
> Behalf Of David Dowell
> Sent: Monday, April 11, 2005 6:23 PM
> To: diy_efi at diy-efi.org
> Subject: [Diy_efi] HiWay Mode Question
> 
> I've installed a 747 on an older RV.  With gas prices being what they are,
> I'm looking for max mpg.  Therefore, I've implemented the Hiway Mode Patch
> (Hiway747.zip) that I found on the diy-efi uploads.  I've also modified my
> ALDL stream so I can monitor the Hiway timer (at L0078) and the commanded
> AFR (at L00A5) so I can see what is happening.
> 
> When I drive the vehicle, and all the qualifications are met (temp above set
> value, mph above a threshold for more that the set time and MAP below a
> threshold) it refuses to set the Hiway mode timer and go into Hiway mode
> UNTIL I stick my foot in it and push the MAP above the upper limit
> threshold.  It then immediately sets the Hiway timer and drops into Hiway
> mode when the timer hits the threshold.  It then seems to behave normally
> and drops out of Hiway mode (zero's the timer) when the speed drops below
> the threshold.  BUT, it also holds hiway mode no matter what the MAP reading
> when the speed is above the threshold.
> 
> Has anyone else seen this?  I've looked at the assembler code and the
> comparisons seem to be correct.
> Does anyone have any idea as to why this is happening?
> 
> Thanks,
> 
> 
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